You can have the same hand-matched Cloyes Hex-A-Just® True® Roller Speed Set that was used in EVERY IROC® Series race engine! Before its demise, IROC Series drivers were among the best in the world, and they accepted nothing less than the best parts for their engines. That’s why every one of those 500 hp, 7000 rpm engines used a Cloyes Hex-A-Just® True® Roller Set for their timing needs. Race after race, mile after mile, these sets always perform at the highest level.

LS1 / LS2? . . .  LT1 / LT4? YEP, WE’VE GOT ‘EM ALL!! Looking for serious speed from your LS engine? Our LS-1/LS-2 sets start with All-Billet Steel Sprockets, made “oversized” to eliminate chain slack found in OE and other aftermarket sets. Both sprockets are then Induction Heat-Treated, and “Hand-Matched” at the factory with our Premium TRUE® Roller chain – giving them superior strength, and precise accuracy for unmatched performance. Over 30 different True® Roller sets for LS Engines! We’ve got you LT-1 and LT-4 guys covered too! Cloyes offers True® Roller sets for both the LT-1 and LT-4 engines. These “All Billet” sets are also “Hand-Matched” with oversized sprockets for maximum performance.